class B
{
	int x = 100, y = 200;
	public void setX(int x)
	{
		x = x;
	}
	public void setY(int y)
	{
		this.y = y;
	}
	public int getXYSum()
	{
		return x + y;
	}
}
public class A
{
	public static void main(String args[])
	{
		B b = new B();
		b.setX(-100);	//b.x == 100
		b.setY(-200);	//b.y == -200
						// 		 -100	
		System.out.println("sum = " + b.getXYSum());
	}
}
